Seamless jacketed kettle.



A. M. ERICKSON.

SEAMLESS JACKETBD KETTLE.

APPLIoATIoN HLBD 11mm; 1911.

1,004,001 Patented sept.'26,1911.

' citizen of the United UNITED sTATEs PATENT oEEIoE .XEL M. ERICKSON, OF CAMBRIDGE, MASSACHUSETTS, ASSIG-NOR TO S. D. HICKS da SON,

i 0F BOSTON, MASSACHUSETTS.

SEAMLESS JACKETED KETTLE.

Specification of Letters Patent. Patgnted Sept, 26, 1911, Application led March 3, 1911.

Serial No. 612,005.

To all whom it may concern:

Be it known that I, AXEL M. ERICKSON, a States, and resident of Cambridge, county of Middlesex, State of lvlassachusetts, have invented an Improvement in Seamless Jaeketed Kettles, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing' like parts.

This invention has for its object the production Iot' a novel seamless jacketed kettle for use in dyeing, tanning, candy making, and other processes wherein the contentsv of the kettle are heated by the circulation of steam or other heating medium in the jacket, the kettle forming the subject of lny present invention being constructed without rivets or similar fastenings.

(')rdinarily steam jacket kettlcs are made by nnitingthe rim portions ot' the inner and outer shells by oneor more rows of rivets to .form a [luid-tight joint for the heating chamber provided by spacing apart the shells, and the outer shell or jacket is provided on opposite sides with tubular nipples for attachment ro -the inlet and outlet pipes for the steam orother heating medium. The use of rivets" 1s objectionable, for not onl'y is the cost ofthe kettle increased but great care has to be taken in order to prevent leskage, while the use of the inlet and outlet nipples is also objectionable for similar reasons.

By my inventiolf'obviate the use of the rivets and also do away with the separate nipj'ilcs in the jacket, reducing the cost of the kettle and at the same time increasing its strength and eiiieienc The novel features of my invention will be fully described in the subjoine'd specifica-V tion and particularly pointed out in the following claim.

' Figure l is a vertical dlametral section of a jaclnted'kettle embodying my present invention; Fig. 2 is an enlarged sectional detail ot' the rim-still`ening member and the fluid-tight joint formed adjacent thereto between the shell and the jacket of the kettle.'

In accordance with my invention the kettle comprises an inner shell l, 'and an outer shell or jacket 2, both of copper or other suitable seamless sheet metal, spun or otherwise formed into the desired shape, and spaced apart at their lower portions to pro- )assae'es beiner shown as su stantiall t! b vide a chamber 3, Fig. l, for the circulation of steam or other heating medium between the shell and jacket. Aroundthe rim of the kettle I place a rod, heavy Wire or other stitfening member 4, herein shown and referably circular in cross-section. The inner faces of the rim portions of botlrthe shell and jacket are tinned or otherwise suitably prepared to be sweated together by solder, and the jacket is first rolled around the stiifening member, as at 5. Thereafter the rim portion of the shell l is rolled around said member 4 and superposed upon the rolled part 5 of the jacket, as at 6, the superposed portions being united, preferably by sweating with solder, indicated in Fig. 2 by the heav line' 7. A perfect and fluid-tight joint is t ius provided between the shell and jacket at the rim portion thereof, and preferabl y I run solder into the corner between the jacket and the rolled'rim portions, at 8, Fig. 2. Thereby I obviate the use of rivets or similar fastenin s and reservev the unbroken continuity 0% the she l and jacket adjacent the rim of the kettle, while securing a superior ,fluid-tight closure for the chamber 3", and" at the same time I properly stiften 'and strengthen the rim of the kettle by the Smember 4.

The head of the nipple 9, having a flange 10 sweated or brazed to the interior of the shell 1 at the bottom thereof, and provided with usual drainage duct 11, is interposed between the bottoms of the shell and jacket, as is customary, a nut 12 and packing 13 securing the nipple in place and preventing leakage from the heating or jacket chamber 3. In accordance with this portion of my invention, however, I make the nipple somewhat larger than usual, and form therein separate inlet and outlet passa es 14, lpsaj-d shaped, at opposite sides of the duct 411 and with their inner ends communicating with the chamber 3 and turned in opposite directions. As shown in Fig. 1 the outer-ends of the `passages are internally threaded at 17 and 18, for the reception of the ends of sultable supply and discharge pipes (not shown) whereby steam or other desired heating 1nedium may lbe caused toeirculate in the chamber 3 to heat the kettle and its contents.

The drainage duct l11 is connected'witha suitable drainage pipe 16, partly shown 1n Fig, 1.` By utilizing the drainage nlpple' also for the inlet and outlet ports or pas,- sages for the jacket chamber 3 I obviate the use of separate nipples in the jacket 2, and preserve the continuity thereof.

The drainage nipple 9, with its central duct, has been used heretofore in jacketed kettles, serving not only to drain the inner shell' butalso to fiXedly connect .and posi tivelysce apart the bottom ofthe shell and the rim of thekettle.

Changes or modifications in details vof construction and arrangement may be made by those skilledv in the art without departing from'the spiritand scope of my inven- 4tion as set forth in the .claim hereunto anneXed. y

Having fully described my invention,

what I claim as new and desire to secure by .Letters Patent is:

Ajacketed kettle comprising seamless inner and outer shells of sheet metal spaced apart to form a chamber for the circulationof' a heating medium, the outer shell constituting a jacket, said shells being secured togetherat their upper edges to form a Huid-tight joint, anda nipple connecting the bottom of the inner shell and the jacket and having ay drainage duct for the shell, said nipple having separate passages communicating-with the chamber for the admission and discharge of the heating 1ne dium whereby the shells of sheet metal are intact except for connection with said nipple.

' In name to this specification, in thepresence of two subscribing witnesses.

AXEL M. ERICKSON i Witnesses: l

1 JOHN C. EDWARDS,

n S. T. Hicks.

vtestimony whereof, I have `signed myv 

